East or west doesn't matter. The closeness of the ski area matters. How often you actually ski is strongly influence by how easy it is to get there, especially when you're a kid and relying on others for transport. The more you ski, the better you'll get.
Now, having said that, I'd say the East because the ice is an unforgiving task master. I remember my daughter's first visit to Copper and first run (she was seven) she come down one of the blacks and her reaction was "That was easy!" She'd been intimidated by the height of the mountain and its vastness until she hit all the nice soft powder that was on the trail. After having spent her early years on the horrid conditions at Camelback in the Poconos, blue ice and CROWDS, to have the slope practically to herself was a joy. Add in nice soft snow, the pitch was just not an issue. She then proceeded to take my brother (not me!!!) down one of the long bump runs. She emerged with a grin from that as well.
And this was all pre-race team. Once she started having regular training around 11, she left me in the dust no matter where we were. Now we live in the West. I personally had all of one season to get over claiming there was "excess snow on the hill". She never felt like that at all.
Of course, she learned to ski at 3 years old and her first season she went out 20 days and it only increased each year after that. If we'd actually LIVED by the mountain? She'd have been running rings around me way before she was 7.