It depends where you want your licence issued. In terms of training quality, there is little to choose between them; and yes, I am sufficiently familiar with both providers to make that informed statement. If you go with FTE, your licence will be issued by the UK CAA and if you go with Sabena, it will be issued by the Belgian authority. If the state of licence issue is not a concern, it comes down to where you would prefer to spend about a year of your life and how much you are prepared to pay. In the end, there's only one person who can answer those questions.