I run a Purolator 30001, and have for years. I used to cut my old filters open, but haven't in a long time. The difference between the short and long filter is only the filter media. Everything else is the same. If you understand how a filter works, there is a bypass valve in every filter. If it didn't have a bypass valve, than you would risk an oil filter explosion. This used to happen in the past until they invented the valve. So essentially what you are doing by using the longer filter is DOUBLING the available filter media, which would make the filter less-likely to send oil down the bypass. There is no easy way to know if your oil is going through the media or bypass. In this way, I believe the longer filter is better.
Another advantage, tho neglagible, is a slight cooler-effect of the filter itself. I don't know that it matters at all, but it's worth a mention.
2001 TJ; 1999 XJ; 1993 ZJ