You know what. Don't trust the Stompy brand too quick. I got them both out and really had a good look. Here's a comparison photo:
HftD Battle Blades Bumblebee on the left and DotM Bumblebee on the right.
http://i282.photobucket.com/albums/k...r/DSCF0131.jpg
Before I elaborate, the HftD Battle Blades version is better.
After carefully inspecting both, I noticed that they are near identical as a mold, with the DotM version just smaller. The DotM version shares the exact same conversion bar the little grills on the abdomen of the HftD version and almost the same sculpting. The arms aren't as small as I remember on the HftD one.
The DotM would have been great if it had a neck. The HftD Bb has a neck and really gives it a better stance and presence than the neckless DotM version.
HftD Battle Blade Bumblebee
http://i282.photobucket.com/albums/k.../Image0445.jpg
DotM Bumblebee
http://i282.photobucket.com/albums/k.../Image0446.jpg
Another plus on the HftD Bb has the Autobot insignia popping up as a crest on the chest. Then the paint apps and the weapons making it a much better version than the DotM.
The DotM version has a different elbow bend though that allows its hand to be parallel to the bend rather than the HftD's palm towards the elbow. Which allows for much more natural looking poses than the HftD's arms, which makes it look moneky-ish in poses (see close up above of HtfD version) due to the bend.
HftD on the left, Dotm on the right.
http://i282.photobucket.com/albums/k.../Image0444.jpg
The HftD Bumblebee can only bed its arm 90 degrees while the DotM version can bend to almost 180. Knee articulation are the same and is pretty crap in both figures:
HftD on the left, DotM on the right.
http://i282.photobucket.com/albums/k.../Image0447.jpg
So, STL, I hope you haven't bought the DotM Bb yet! It's still a good Bb and better than all other ones in the movie line except for the HftD version.