you need to look at the shape of the lobe and without getting too deep into it, look at duartion @ .050 and also @.200, you have to find a lobe profile catalog usually.
here is an example from Howards.
https://www.howardscams.com/sites/default/files/lobe%20list%20email%201-20-2014.pdfit lists regular profiles, fat rate profiles, ford profiles and mopar profiles.
just based on a quick glance it looks like the ford .875 profiles are just a tad slower than the mopar profiles...which seem to be close to some of the roller profiles. keep i mind that is still a pretty simple look at things. the nose of the roller profiles could be much different then the flat tappet cams which means more area under the curve.
