What's the better one? Sporter or target/varmint.
The trigger doesn't bother me.
I can only speak for the sporter synthetic as I've not used the varmint,
It depends what you want out of it really... trigger aside, the varmint barrel
should be more stable over extended shooting periods as the barrel won't heat up as quick, it
should give you a more stable platform for shooting prone off a rest at longer ranges. It won't be as light and handy off hand though, and long range accuracy will entirely depend on how well its put together and what ammunition works best.
I don't think .17HMR are ever going to qualify as real precision long range rifles in the same way as 6mm would, but thats not what it was meant for, where it really shines is extending the range of a rimfire from 70 yards ish with a .22, up to 120 ish (some will chime in here with much longer shots I'm sure) if the gun and you can shoot that distance. This does come at the expense of noise of course.
Undoubtedly the stainless synthetic is a pretty gun, and if you like it over the lighter more utility sporter synthetic, thats great. Within the ranges that the .17 can kill at, I doubt if there will be a huge difference, but if you're shooting bunnies/tin cans prone at max range and want stability over portability the heavier varmint will prob be better for you.