I prefer the feel, weight and sway of an 8yarder. I have both a heavy wool 8-yarder and lighter-weight 5 yarder. The five yarder has far thinner pleats, sways a lot different, and is prone to blowing up in the wind. The pleats do not stay in place very well, and it more oft than not looks like it needs a good pressing.

The wool tank, on the other hand, always looks great. The pleats are very deep and stay through almost anything. The heavier wool has a looser weave, and it breaths a lot better than you would think. I've been in 90+ degree days mowing the lawn in both a UK survival and a wool tank, and the tank was far cooler than the UK.

since I've bought the tanks, I rarely wear my 5yarder.