I don't know if you can compare the turkey sandwich to the roast beef sandwich. I think the Original 1762 Sandwich is the best sandwich at EOS. Roast beef and horseradish is a classic combination, as well as beef and cheddar is. It's a savory, balanced taste and marvelous on the warm bread, IMO. Maybe I'm biased because I was raised in Western New York, where a regional favorite has always been Roast Beef on Kimmelweck roll. If you ever pass thru Buffalo, you should try it at Charlie the Butcher, near the Airport.
The turkey sandwich has ranch dressing and it comes off sweet. Personally, I don't care for ranch dressing. It overwhelms whatever it's put on. I know people who put it on everything, including pizza not long ago. What these people like is the ranch flavor, not whatever is underneath, which it covers up.
Ultimately you have to decide if you like the taste of the original sandwich elements, or the sauce that's covering them. That will decide if you like the Original 1762 Sandwich, where the basic elements stand out more. If you have some doubts, you could ask for the horseradish sauce on the side, then add what you feel comfortable with.
Give it a try. I'd be interested in how you liked (or hated) it.
