I got a starter kit from a local B+M consisting of an Aspire ET-S top with a new-type BVC coil fitted, plus a KangerTech Evod 1000mAH battery, and I was getting on pretty well with it.
I decided to go back to the same shop for another ET-S to make it easier to switch liquids - but the second one I got, from the same shop, seems not to be so good at its job. Vapour output seems to drop rapidly after only a couple of puffs, there's a lot of "gurgling" sound, and it has leaked a fairly big amount of liquid down in to the connector top of the battery a couple of times (even after I tightened up the fit of the coil head in to the lower part of the assembly). Also, its air holes in the side seem a lot smaller than on my original one. This is my first setup so I'm not 100% sure what's "normal" and not.

The new one is the silver one on the left and seems to have issues, the black one on the right is the original one I got and it seems to be doing the right things as far as I can tell.
Is this much variation between what should be identical items normal, or would I be right to describe the new silver one as faulty and take it back to the shop for refund / replace?
(Or would it be worth trying a new coil in it, even though I haven't had much through that new coil, in case the coil is crap? I do have spares of the BVC coils, and have replaced the one in my original black ETS already.)
I decided to go back to the same shop for another ET-S to make it easier to switch liquids - but the second one I got, from the same shop, seems not to be so good at its job. Vapour output seems to drop rapidly after only a couple of puffs, there's a lot of "gurgling" sound, and it has leaked a fairly big amount of liquid down in to the connector top of the battery a couple of times (even after I tightened up the fit of the coil head in to the lower part of the assembly). Also, its air holes in the side seem a lot smaller than on my original one. This is my first setup so I'm not 100% sure what's "normal" and not.

The new one is the silver one on the left and seems to have issues, the black one on the right is the original one I got and it seems to be doing the right things as far as I can tell.
Is this much variation between what should be identical items normal, or would I be right to describe the new silver one as faulty and take it back to the shop for refund / replace?
(Or would it be worth trying a new coil in it, even though I haven't had much through that new coil, in case the coil is crap? I do have spares of the BVC coils, and have replaced the one in my original black ETS already.)