No_regrets, you will have no regret going with a line contact. It is a superior way to read the groove so it just is over an eliptical is the point(literally), that has nothing to do with the original cartridge design or tone. Cheaper stylus, less efficient is still a cheaper stylus and less efficient in your original, it will just make the details of your cartridge and its true potential come that much closer putting the better stylus on it, change the sound, almost likely no matter what to the up side if anything.
Don't worry about it trust me, go with the better line contact, the 250 version is fine and will NOT be a negative effect over the original that much is for sure in most cartridges, but making a miracle or sounding a whole lot better is not guaranteed either.
Don't worry about the downside is the point, there will not be one from everybody that has had the soundsmith treatment I am sure will tell you over and over. If this risk was built into a 2500 dollar investment getting a retip vs. a 250 then you might want to second guess, and the original at a cheaper price would be fine, but get the better stylus no doubt in this case.
Don't worry about it trust me, go with the better line contact, the 250 version is fine and will NOT be a negative effect over the original that much is for sure in most cartridges, but making a miracle or sounding a whole lot better is not guaranteed either.
Don't worry about the downside is the point, there will not be one from everybody that has had the soundsmith treatment I am sure will tell you over and over. If this risk was built into a 2500 dollar investment getting a retip vs. a 250 then you might want to second guess, and the original at a cheaper price would be fine, but get the better stylus no doubt in this case.