You've got the one on the right. The one on the left has a tag, but the Toyota part number is illegible. The NipponDenso part number ends in -5930. One thing I've never been able to find online is a cross-reference between Toyota and NipponDenso part numbers - that would be especially helpful...
The ear (for the adjusting bolt) on your alternator is further from the crankshaft pulley than the one in @cruiserdan's photo. I think I have two different alternators in the basement that match your photo and his photo, I'll go snap a photo of them side by side.