The Techstar Allround isn't a sprint spike, it's a general purpose track spike that can be used for most track events. XC spikes these days tend not to be much different in terms of cushioning and protection from some track spikes, you'd be better off using trainers for training and save the spikes for racing!
Bostons will be getting Boost technology in September so will be a very different shoe. Adios is being discontinued from July, but the Adios Boost will continue. I'm racing and doing speedwork in Adios Boost, fantastic shoe, decent amount of cushioning for such a lightweight shoe