I have played all the above and dissected dead strings of all the above. Yes, the .065 Roto G-string can serve as a garrote and I routinely change it out for a La Bella .060. Likewise, the .100 Roto A string is too tense on a long string set compared to the rest of the strings, but I like the .090 A string on short scale and medium scale sets, which with the La Bella substitute G string give a relatively balanced set with the right amount of thump to emulate a double bass, as designed. (I don't know why Roto won't lighten up the G string 5 thou or make one .095 to split the difference between the long and short scale sets, but there you go. Tradition is a tough thing to change, even though there may be some shortcomings.)
La Bella tapewound strings are all really similar in tension according to gauge. The nylon wrap tape adds @ 15 thou to the diameter of the string, but essentially no mass. So under the tape the regular gauge 60-115 sets have tension comparable to as set of conventional rounds 45-100. Likewise, the light gauge set 50-105 under the tapes has similar tension to an extra light set of 35-90 rounds.
Read the tapewound club thread for more info.
