8 XXX : NakedProgress

I actually do see a difference. You appear a bit more defined in the right ones. Your deltoids and stomach seem a bit tighter. Being tan usually brings out definition, but in your after pic, you are not tanned and still look more toned which means you're progressing. The gap between thighs is bigger as well which points to more definition in your legs. Remember, there is no magic pill or exercise that shows huge and immediate results. This is a marathon, not a sprint. From the looks of things, you're well ahead of the pace. Just keep it up and you'll transform what is already an amazingly rocking body into something that could be featured in a fitness magazine! :)
Are you tracking your macros? because this was my problem, lifting won't make a big difference if you are not counting your calories according to your goal. also, 6 weeks is very short in terms of muscle building.