The Clan LPL is better in every single way than the Snubbie and anyone who asked (or ordered) me to use the latter instead of the former while the former is still available is going to walk away bloody. The Clan LPL has better modifiers to hit at 1-6 hexes (-2 instead of +0), the same modifiers at 7-9 (+0), and better modifiers and damage at 9-13 (+0 and 10 damage instead of +2 and 8 damage), much better modifiers and damage at 14 hexes (+0 and 10 instead of +4 and 5), back down to 'merely' much better at 15 (+2 and 10, versus +4 and 5), and then can actually still hit things from 16-20. The Snubbie replaces the Inner Sphere LPL just fine, but the Clan version is the kind of weapon a warrior would sooner kill for than replace with IS tech.
If the Omni restriction wasn't in place, I'd be first in line for an IS XL Gyro. Instead, I'll go with the Silver Bullet Gauss, since even the Clan LB-10X only reaches to 18 hexes. Additional damage at greater range is a good reason to switch.