There are things I like and don't like about both. I like the 2XB hull on the Alumacraft, it is a little thicker on the 18 since G3 keeps the same thickness for 17 and 18 footers while Alumacraft increases it. I like the ladder better on the G3 (seems less likely the screws would come out with being used), and it also has a platform for the person to step onto whereas the Alumacraft doesn't. Storage seems better on the Alumacraft in terms of quantity, but G3 has the nice bins to keep things dry. I definitely like the rear jump seat area better on the G3 with the live well in the middle instead of under one of the seats. I haven't sat in a G3 that size so don't know how deep the front sitting area is. I like the shape of the bow better on the Alumacraft for cutting through water. The lifetime rivets warranty on the G3 is only on the transom, keel, and chine (rest are 5 years).
Not really worried about Alumacraft not being around - they are a BPR brand and will be around as long as their new roto motor isn't a total flop (which it might be). And I want to buy either new or late model used. But used prices are really high still and you're stuck with whatever inventory is out there.
Seems like I need a 150 for 18 footer, which brings the prices in line with each other (G3 boat is cheaper but Yamaha motor is more than Merc).
Part of it is that I'm unsure what the incentives will be in the spring. Right now G3 aren't good on 2024 and Alumacraft is only $1000. You'd think with the economy slowing they'd have to up the incentives to move boats which are maybe the #1 discretionary spending large ticket item people buy.