That's fine, but if you're evaluating the amount of time it takes to load a webpage, you cannot ignore the time it takes for the client request to reach your server in the first place or for the client to then unpack the data. The time saved transmitting such a small number of bits will be a fraction of the time spent making that initial request anyway. That's all I'm saying.

OP is only looking at transmit size differences, which is both not the same as transmit time differences and also not what the user actually experiences when requesting the page.