Refreshing Access Layer, curious of differences in these models?

So I am refreshing a bunch of floors and I'm trying to see the true difference between a

9200-48P-E and a 9200-48PXG-E

If anyone could help me that'd be great, I Though it was due to the POE, but the specs page cisco offers isn't really clear.

Thanks in advanced.

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ASLO: LOL april fool's and the only flair options. Got me good.