Pneumatic trail has a similar practical affect as certain knobby patterns - depends on the tire. Something like the gravel king sk has a lot of bite on dry pavement and the 35mm feels similar to the WTB Horizon at 20% sag. I also feel pneumatic trail is somewhat reduced in effect on a lot of off road surfaces when there’s a loose aggregate over hardpack.

That said if you can ride a few different bikes you can get a better handle before you spend your money. Trail and it’s effects are heavily influenced by rider position and preference and it’s hard to determine what you prefer without feeling the options.