Think you need to put the comments RE BA engineers preferences into context . This is comparing the GE 90 - 94B the Trent 800 which i fully agree with . The GE had a difficult entry to service with BA , and they then got the Trent when it had been in service a few years as it also had some problems . The most common GE at present is the 115 which powers the 777-300ER /200LR . Totally different from the earlier engine and although there are a few issues its a very reliable engine , and from a line engineers point of view , doesnt use oil and very rarely open the cowls !! Unlike the 94b !!