Grainfather v. Robobrew comparison?

I looked to see if you had a thread on this subject, but found none. A few weeks ago I saw a video on You Tube that compared the two systems. I'd like to know if anyone here has done that? (Gash?) The main thing that I took away from the vid, that concerned me about those systems was that for a 5 gallon (19L?) brew, the Robobrew was filled up almost to the top edge just before the boil, and the Grainfather looked like it still had another 3 or 4 inches (don't ask me about MMs or CMs) left. Either way, if you're going to get a really active boil in either one of them, it seems like you'd be having boil-overs all the time unless you babysat them constantly) like I have to do anyways, but I thought these systems were supposed to be worry-free!
Just wondering if anyone else has any input as far as pros and cons of the two systems.
TIA

@ Gash - Yeah, that was the video I was mentioning - the head space was the concern I had ..... after watching it again, the fluid level doesn't seem as close to the top as it did in my mind - see how quickly the mind goes in us old goats? I really enjoyed watching it for the second time, Thanks!. When I changed laptops, I accidentally lost a lot of the videos.

We may be having/planning to move clear across the country this next Fall (Sept/Oct here in the US), so I'm trying to finish putting together my 3-pot electric brewing system, so's I can get it up and running, advertise it and sell it for enough money to buy a GF or RBB for the small cabin we will be moving into in another state. That was why I wanted opinions on the differences ..... Really, the only plus that I see in the GF over the RBB is the fact that the GF has a PID for control, and I think it can be separated from the equipment. That would be a added plus if it needed repairs, but as you mentioned in your post, the RBB is1/2 the price, and for me that's a BIG consideration!
The one thing I don't like about both of them is that the heating element is not user-replaceable. That might be fine if you live close to a dealer, but in my case, it's not a good sales point. I'd rather have them send me a replacement part, than to pay the postage to send it back and forth for a repair, that's just me, of course, but because I was an appliance repairman, replacement of failed parts would be no big thing!
Thanks

Thanks Gash for your comments.
I'm looking at both of them right now for a new system in the future. I'm finally getting close to finishing my 3 pot electric system (which won't fit into the very small cabin [16 ft x 16 ft] we are most likely going to move into in the fall), so as soon as I get it done and up and running . I've invested much more than a GF would have cost me back then, so I'll take a loss but I'll advertise on Craigslist and try to sell it for enough to buy either one of those OR possibly a "Brewer's Edge Mash & Boil" (www.williamsbrewing.com) which, with a 4 gallon sparge water heater would run about $460 - about $12 less than a Robobrew. For me, the off-putting part of the Mash & Boil is the lack of a recirc system like the Robo and GF have. I'm curious about that, do you see the recirculation of the wort being a big deal, as far as the quality of your brews, or it is just more for show, in your opinion. The M&B is probably made in another one of those factories next to the Robo and the GF in China, since it doesn't say Made in USA or anywhere else in the catalog!
BTW, due to your info and comments, as well as the price of a GF ($999.00) I would most likely be going with the Robo if not the M&B, because of the cost factor, also, I am such a computer illiterate that Bluetooth/Wifi wouldn't help me at all!
If I did decide on the M&B, I suppose I could put a pump after the valve on the M&B outlet, and 'create' a recirc system it the opinions of you and others who are familiar with the Robo think that the recirc system is an advantage, rather than just a bunch of whistles, bells and buzzers. But, of course, that would put me right back in the range of a Robo, with less work and headaches. All in one! Unless I can find a 4 gallon coffee urn for less cost, I'd still like the sparge water heater, just for convience sake (IF I can make room for it where we're moving to.).
It's still illegal here in the US (last time I checked the ATF website), to make your own hooch, so the distiller wouldn't make any difference either.

These are the small systems I've been looking at for comparisons - the top two are definitely out! I like beer, but at my age, one of these high end systems would have to out live me twice over to make it worth it for me.
Picobrew Zymatic - $2000 - 2.5 gal - Morebeer.com
Braumeister - $1800 - 5 gal - Morebeer.com
GrainFather - $1000 - 5/6 gal - Wiliamsbrewing.com
Robobrew - $473 - 5/6 gal - Wiliamsbrewing.com
Mash&Boil - $300 - 5/6 gal - Wiliamsbrewing.com

Thanks - I'd appreciate any input!