Any real difference between factory 340 and 360 connecting rods?

I did not know the bearings were date coded, here is what I found on a rod bearing:

8-85 X
.010
CB 481 P
Clevite 77

Here are a few dial caliper measurements I made if anyone is interested:

496 (340) rod
large end w/o bearing 2.2488" (cap not torqued down)
beam width .5413"
large end width .9275"
distance between bolts 3.561"

645 (360) rod
large end with bearing 2.114" (.010 undersize)
beam width .5039"
large end width .9259"
distance between bolts 3.566"