What looks more like a Lutheran service a Tridentine Mass or a Novus Ordo Mass?
I have experience with Methodist liturgy and the resemblance to the Novus Ordo is amazing....the Tridentine...is unlike any of these.
I've never attended a Lutheran service and to my knowledge, a New Mass so it's difficult for me to compare. I will say that all this modernism in the churches/Church is beginning to make it difficult to distinguish one from another and is the forbearer to ecumenticalism. Personally I think that's a (very) bad thing but IMHO what drives it is corruption of doctrine.
Keep in mind that the Anglicans and some other Protestant denominations revised their liturgies after 1970 to make them more like the "Novus Ordo," so if your experience is much after 1970, the "resemblance" may not be coincidental, but may be a deliberate imitation on the part of the Protestant group. For example, the Anglican "Rite II" (promulgated in 1979) is basically the NO Mass with some Protestant tweaking done on it.