XLT is more plush, rugged/durable, comfortable, superior on technical trail / descents...yada, yada, yada.
XLT is less efficient, heavier, more sketchy on the climbs.
That would be comparing an XLT and XC with the same "level" build. It wouldn't be too fair to compare my build to your build b/c trail riding is what I'm passionate about therefore that's where I have sunk all my $$$. I don't have a rocket road bike as well, so I can afford to make the XLT more efficient, lighter, yet still tough and plush.
Mine:
