That shifter is from a 1990 DSM. If it was in a later model car someone must have swapped it (for some reason, I don't know why they would)
The lever arm below the pivot on that shifter is shorter than stock, which INCREASES your throw and decreases shifter effort.
The lever arm above the pivot is shorter than stock, which DECREASES throw and increases shifter effort.
The overall effect is probably (but I can't confirm without actually knowing dimensions and doing some math) some decreased throw and some increased shift effort, however, some of the effect of shortening the upper lever is sacrificed due to the shorter lower lever.
On a 91-94 style shifter the lever arm below the pivot is the same as stock = no change. The lever arm above the pivot is shorter which decreases throw and increases shift effort. So you have a much greater effect on both throw decrease and effort increase.
Personally I didn't like the 1g shifter and made the 3000gt shifter that the P.O. had sloppily put on work correctly (it requres some work to make work, but I think it's the perfect shifter for our cars - slightly smaller upper lever and longer lower lever)
If you want to try out a 91+ I have a few and could send you one (with a decent boot if you want as well) $15 shipped for just the lever, $25 w/ boot.