When driving from Jasper National Park to Kamloops which is the best road for scenery?

Hi and thanks for reading and hopefully you can help.

My husband and I will be travelling from Australia to Canada in April 2010 and will be driving from Calgary to Vancouver. We are going to stop in Banff and then either go to Lake Louise and stay over or go right on to Jasper.

We then have the option to drive from Jasper to Kamloops using BC-Yellowhead Highway/Highway 16 or come back the way we came from Jasper, stop overnight in Lake Louise and then travel on to Kamloops on Highway 93 and then Highway 1.

My question is, which route has the better scenery? Yellowhead/Highway 16 or Highway 93/Highway 1?

Thanks