simple answer is, taka a very short-term debt buy both and as soon as you have paid for both they will have increased in value, you would have ridden them both by then and will find it hard to part with either. if you absolutely have to part with one then you'll know which it will be and once you know which one you like you can then sell the other and use the money to buy something similar to the one you kept...as one nsr is never enough.