well the mg31 red s/o impact is stronger, faster and has an anvil stop feature, than a 2115ti... also a 2 year warranty to boot... it's easier for us, where i run my route to get a S/o gun fixed than an IR, there's one guy in town who does IR and he doesnt do warranty, and IR had us sending them to ohio where the idiots wouldnt fix them, send them back in pieces and they were badged "unrepairable" at 6 months old... so i sell what my customers can rely on having work for them, or fixed when necessary.. also snapons have generally better low pressure performance (but snappy aint had a decent 1/2" gun in 2 years) but the im6500hp is a goodie....