BDGA: 2. e4?! or 2. e4!

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supware

Just a quickie for you: I've noticed that the analysis engine on the PC version of Chess.com classifies the Blackmar-Diemer gambit (1. d4 d5, 2. e4?!) as an inaccuracy, but the analysis engine on the mobile app lists it as an excellent move (1. d4 d5, 2. e4!).  Anyone know what's up with that? Have you noticed any similar discrepancies with any other lines you play?