IMO it’s down to the instrument panels: the T-45C has an early 1990s-ish configuration with modern HUD and computerized MFDs, and I quite like it – but like all HUDs in this sim, it has visual “smudging” with TAA antialiasing, so you’ll want to temporarily switch to DLAA to fly it, which degrades visual quality on buildings.
The MB-339 is old fashioned steam gauges – I find it a bit overwhelming and prefer the sparser, more information-dense computer displays on the T-45C but I know a lot of simmers love steam gauges. 