Your post triggered my curiosity and I went out to check mine, and I have the 145e. I purchased it from proplates, but no green flash option though.The newer 145e has better tolerance to ANPR recognition (ie reduces the chance of mis reading the plate) and are more robust so should last longer - having been required to replace a couple in the past due to them prematurely deteriorating and being picked up in an MOT, a longer life plate is worth the little extra hassle of obtaining ones that meet more robust standards.
I've had several plates, and not had any deteriorate over the decades or be flagged up as failing. I have to admit I have recently started to buy new plates whenever I change my car.
Are you purchasing from reputable companies?