I don't know if performance is important, but the E28+ is the faster boat per the US PHRF site's ratings by almost 15 points.
Sabre has great build quality and is in fact still in business. However, due to the offset prop they are supposed to be a bit of a bear in reverse.
Don't forget the basics...that the price of a used sailboat is highly dependent on if it has a diesel...preferably recent or recently rebuilt...and good / a lot of sails. The need to replace either can make what seems like a great price not so great.
The number one rule though is buy what you like. Check them both out...but don't buy something you don't like and/or can't live with.
To me the Tartan is beautiful...but I finally got around to oiling my teak the third year I had my boat. That's me...but up here in New England the season is darn short...sounds crazy but most years all the boats aren't in until July 4th...no kidding...July..and they are out by mid October. It is amazing, but true. Snow stops flying...it finally stops raining...pull all the lawn furniture out...clean up the lawn from winter...then its paint
the bottom, wax the hull, reload all your junk and then splash...its July.
Don't get me wrong...I love teak...but not gray teak...and unfortunately between working and working around the house...a Tayana with teak decks is something to be admired...but from a distance.
It is one of the things that has kept me from upgrading to date...lack of time...a reluctant Wife...and knowing that I can do anything on my 25 footer by myself in a day. Last year we washed her, painted her bottom, loaded everything aboard and waxed her in a day. I even cleaned and oilled her teak (hand rails, trim around the companionway and around the sliding hatch
). I hoped to apply another coat in the water...but it didn't happen...went sailing instead. Much more fun!