the Goliath is only 2 pounds more, and you bet more room.
The great thing about summit stands is, the platforms are almost all the same, once you get one then you can call summit and buy any top you want at a lot lower price then a full stand an and the 2 parts will still fit together nice.
My friend has a extream complete stand and a older cobra top for bow hunting.
I have the gun rest on mine but it is more a pain in the butt then it helps when you pack the stand in or out. It does work well for longer shots with my contender.
The summit comes with full body safety harnes that is one of the better ones on the market.
I got the side bags for mine. they are ok but are also a pain when back packing the stand. I use mine to hold my soda bottles candy and a lot of other little stuff that is nice ot have close.