I don't see anything screaming cockerel yet, but I've only had a few W's, ours did mature quickly, but our only cockerel was evident by 4 weeks, so I would say pullet for now. Not sure of your birds color but looks more like a GLW to me.
Cockerel.
I might eat those words in a few weeks, but I've never had one of our EE's feather out like this bird that wasn't a cockerel, but it's close, I'm not 100% but 85%.
Can you get better pictures of each one, especially from the sides and top? EE's can have single combs, it's not un-normal.
They both look like cockerels based on the lack of pattern and coloration, but single full body pictures would certainly help out.
Way to young to determine, Wyandottes mature quicker than most and get combs and wattles early on, the color looks ok to me, but in another 4 or 5 weeks you'll know for sure.
Looking back at our girls, their comb development was less than yours at 7 weeks but not by much, my concern is the white chest as I stated earlier. I think in 3 weeks you'll know better, ours was obvious at 10 weeks. I think you could have a fast maturing Pullet, but I'm leaning male 60/40 at...
SS's we have had, all matured pretty quick, but that white chest feathering in concerns me, all our girls were even but males had the white chest feathers like yours.