The 'New' engine oil filter is the same filter with screen inside and outside to cure issues that the original filters had. All aftermarket filters already came with these features so there was no need for any changes to the HIFlo filters I sell or the other alternatives.
No one but BRP makes the longer filters for the SE5 transmission so if you go that route you will have to get your transmission filters from BRP.
None of the aftermarket transmission filters suffered any of the issues that the original BRP filters had so none of the aftermarket producers are interested in making this new dimension transmission filter. I suggest you keep the original transmission cap so that you leave your options open.
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I run Amsoil at about 6000 mile intervals (6,400 miles at last change) and have my oil tested. It has come out well above minimum specs each time and I could have run it longer. I don't suggest extending your oil changes beyond what BRP recommends if you are not using a true synthetic, Group IV, ester based oil.