i have the 3 in one and is a fab little stove ideal for a couple but a little small for much more. can squeeze a few burgers sausages or a couple chunky steaks on it no problem and cooks evenly and is easy to clean, both plates live inside when not in use so stores simply too.
mine was on clearance from argos at £30 not sure id pay much more for it. seen it advertised for £90 some places
ive no idea what the difference is i am assuming its whether it has a standard regulator or one for a small canister?
mine attaches to a 907 and lasts ages.
mine has done two seasons and still in perfect nick, i normally take a small suitcase stove for boiling a kettle or saucepan.
that being said i have also got a cheapy two burner with a griddle plate on top this year bought it from ebay with a gas bottle for a tenner and the griddle pate was a fiver in a local shop.
we have a cadac and the campinggaz party grill.
The campinggaz is quite small but very good.
Our cadac carris is good but it is large. We take the cadac everywhere now - we have a big paella pan and cook loads in that.
The part grill is good for short stays but can only bbq. The 3in 1s looking interesting but you will be restricted in what order you cook things. May want a small grill and separate small hob.