The Wellesley and Wellington Funds are rather similar. Not really surprising when you realize that the were named after the same guy (Arthur Wellesley, the Duke of Wellington). The basic difference is that Wellington is about 65% stocks and 35% bonds while Wellesley is 35% stocks and 65% bonds.
No one can tell you whether either, or both, is right for you. Certainly, advice given here is suspect. My own take is that Wellington is more of a long-term wealth creation fund while Wellesley is more for wealth preservation and current income.