The placement of the switch lever on the switch base will affect where the ball engages the switch and can make a difference based on how the switch is mounted to the playfield. Furthermore switches often times have different springs internally which can make a difference in the amount of pressure needed to actuate the switch properly. You may indeed get away with installing the switch you have on hand but if the correct part number is available I would order and install it.

Second one will have significantly more leverage on the switch button so less resistance for whatever is actually activating the lever, but will activate the button a little later in the motion and release it earlier than the first. As mentioned, might not make enough difference to matter.

Terry at Pinballlife once told me "a switch is a very dumb animal". So if you're inclined to, throw it in and see if it works. Worst case, it doesn't and you order the other one.