Just got 2 ea of the 2876XL (6607 equiv.) and 2835XL (MC 910s equiv.) The 2876XL (pic. 3) looks just like the regular PH2876, dome bypass etc., but with silicon ADBV and the synthetic blend media. The 2835XL (pic.1) also has a dome bypass and not the combo valve like the regular PH2835, it's an...