Choice 4.5 or 5.5 Tx 200 (12ft/lbs) hunt sparrow, pigeon at 32 yard (30m)

Either one will do fine if you are shooting them at that specific range. If instead you are shooting them at varying distances out to 30m, the .177 is a better choice for the reason tsakula mentioned. 

A wadcutter pellet is a great choice for sparrows if your gun is sufficiently accurate with them at that distance. I use them on pests up to the size of gray squirrels.