ORIGINAL: FAsea
A good thing about having both is that you can play more scenarios. (searching for positives to having both here)
My impression is that AE will be more modder friendly than WitP. Going forward, we can expect many more scenarios for AE than were ever created for WitP, no?
Scenarios. Right there is, for me, the crux of the matter. If AE has, or will have, an abundance of short-term, therefore playable scenarios, I can see buying it--even if the price is steep.
No way I will commit my entire gaming life for years on end to playing the grand campaign(s) of just this one game. I do have other competing gaming interests after all, not to mention other RL obligations and projects (see my sig).
But if this game offers lots of short-term, therefore playable scenarios--scenarios simulating single engagements (e.g., Battle of Midway, Battle of Leyte Gulf, etc.) or theater campaigns (e.g., War in Burma, Liberation of the Philippines, etc.), I will surely buy it.
WitP with grand campaign(s) and just a handful of token, tutorial-type scenarios? No sale.
AE with many shorter scenarios (and only incidentally--to me--grand campaign(s))? Sign me up!