The numbers are just model numbers really, may indicAte higher or lower spec, or just newer or older models
Look up the spec and compare them and any others that catch your eye. Newer models will have brushless motors that are more efficient so you get a longer run time from the battery, some will have metal gear boxes or full metal gear housings – stronger but there’s a weight penalty. Most useful comparison ( and the one usually least clearly stated)is torque.
I think with the makita range the last few letters in the model number are the bits the drill body is bundled with rather than differences in the drill itself- so they indicate the number of batteries in the pack, type of charger, even the type of box it’s in etc.
Keep in mind if you are buying a twin pack to split you’ll only get one charger. if splitting them and only using one battery each then look at charge times too. Makita tends to have some of the fastest charging batteries/chargers (apart from a few rogue non lxt models. The 3 amp battery chargers much faster than the larger capacity ones so you get shorter down time. You’d need to decide if it’s better to charge quicker or less often
