Dave is right. The only boat that is an apples to apples comparison with the TV-18 is the Crestliner CXP-185. Every other 18-foot aluminum with a bass boat layout is a modified-V hull.
The biggest differences in the two will be the beam width of the boat, and the decks are made out of aluminum instead of wood. There will be some modest differences in the layout of storage compartments, and in the seat posts. But the CXP-182 is a VERY nice boat.