Gah, this *obsession* with sales figures and "wining" against something. It's isnane. It doesn't matter. Quit it.
As for cultural influence I'd say PCE. The Saturn was great and all but I feel the PCE had a larger and more significant impact. In 2016 I don't think there's much influence left from either.
cultural influence was another thing I'm most interested in too.
I've been living in Japan for several years now, but was not here in the early 90s to directly experience the 16 bit era (my favorite era of gaming). A lot of the people I know are too young (most began in the 32 bit era), or not gamer enough (tons of people had a super famicom.. but were casual gamers. I even received a free super famicom from a model who played it in her childhood, but all she had were sailor moon games that she couldn't beat).
looking on the internet I found several fun stuff (all in Japanese)
and it seems there was a PCE vs MD rivalry for (which was the best 2nd system to own).

I don't know which magazine it is from, but it seems to be from a decade ago. (scroll to the right)
Summary:
PCE associated with otaku types who love anime, games involving young girl characters, slippers held together by tape, etc. the Sega guy was an apple guy, tech freak, and a bunch of old era terms that I don't know (like TAR, etc)
another was this blog from a retro girl gaming idol
http://blog.livedoor.jp/tokyozukananno/archives/50953144.htmland
http://blog.livedoor.jp/tokyozukananno/archives/50955181.htmlbasically she summarized
image of MD: black, looks large and bulky but is actually light, American, profound.
she had good experiences with Gunstar Heroes, The super Shinobi, splatter house series, silky lip (never played this, is it good?)
image of PCE: cute and small, light and easy to move, definitely feels like a Japanese machine
she liked wondermomo, galaga, among many others. the feed back in the comment section is also full of nostalgia