Thanks. I did test a couple of different viewers, mostly paint, Microsoft Photos just now but I have checked to see if it translates over to flickr and even this forum. I do see some variation, but generally they are punchier than LR.

Under export, sRGB has been selected, so I assume we are working in the same color space. I did try other color spaces (Adobe, etc) and it made a difference overall, I didn't see a difference in the trend that jpegs were more saturated.