You should drive both, and decide which one you like better. I like my 3.0T in my S60 T6 with the P* tune but it isn't as easy to drive smoothly as many cars I've owned, with an irksome combination of jumpy throttle tip-in, inherently sloppy motor mounts with lots of lash, slushy throttle response at times, and a transmission that is neither smooth nor sporty-feeling. It sounds good at least, and has some decent balls, but it takes a bit of work to drive, and isn't an effortless cruiser if that's something you're looking for. I drove a non twincharged Drive-E V60 with the 8 speed and I liked it better in some respects than mine, and disliked other aspects. The engine sounds mediocre, at least it did in the T5 application. It did, however, cruise very quietly on the highway, and at light throttle around town, although with deeper throttle applications it sounded rather uninspiring and thrashy. It did drive with decent pep even in the low-po version, such that most people would find it thoroughly adequate if not downright peppy, were they not jaded by sportier cars they've owned and driven. Compared with much of what's out there, even the base Drive-E motor feels plenty quick and never felt underpowered. I'm sure the twincharged version feels plenty strong and could keep pace with the 3.0T version under most situations.
Ways in which the Drive-E felt better to me included a more-linear power delivery with less abrupt reactions to throttle applications, which is likely an e-throttle tuning choice designed to make the car easier to drive smoothly, which is much appreciated when you want to find your chill without drag racing every Honda CR-V on the way to Whole Foods. It's easier and more relaxing to drive smoothly than the 3.0T but decidedly less sporty-feeling, at least the base version is, but in some respects, this characteristic makes it a better appliance for those looking for good transportation with fewer rough edges. It seems to have more sound deadening, which is quite likely in part a result of Volvo trying to hide the coarse 4 banger engine sounds from the discriminating entry-lux customer. The motor mounts felt firm and did not feel sloppy, contributing to the smooth and precise throttle response without any of the jerkiness that plagues the 3.0T drivetrain. The 8 speed transmission is wonderful and shifts like it's decades newer than the decidedly retro-feeling 6AT, providing smoothness when driving gently, and clicking off positive shifts at WOT. It's a thoroughly refined transmission, or at least it seemed that way with my limited seat time in the V60.
Both setups have their pros and cons, and they are very different in character, but again, I'd drive both and see which combination of attributes you prefer.