Both are great bows to be honest, the Ross's have a much nicer fit and finish to them than the Martin Pantera, but the Martin has a much nicer price tag, is super quiet, super smooth, and fairly quick too. To be honest, they really aren't in the same category in my opinion though, the Pantera is a mid tier bow geared towards the crowd that doesn't want to spend $700 on a bow but still wants all the features. The Cardiac is pure top shelf bow with all the bells and whistles. The Pantera is also 2" longer than the Ross. Martin and their sister company Rytera have other options that are a much better direct comparison of high end bows withcloser specs than the Pantera ifcomparing to a Cardiac.

If you want something more comparable to the Cardiac, take a look at the Rytera Bullet X with the Vipro single cam if you want smooth, or the nitrous X cam if you want speed. Specs are much closer to the cardiac on that bow and it is more of a top line bow. The Pantera is a bow that is designed to have amost of the features of a high end bow with a really really good price tag. MSRP on the pantera is several hundred dollars less than the cardiac, however the Bullet X is comparable. Rytera is made by Martin, designed and built by the same people and it is positioned as apremium line of high end only bows, there are no budget bows in the Rytera line as of now.

With all that said, I am shooting a bengal right now for hunting and absolutely love it!