A 160 pound rider will have no issues with pretty much any quality wheel set on the market now, but if your primary use is as a training wheel set, get the 28 spoke count set.

It hurts nothing, and may affect the time between maintenance cycles slightly.

If you will use the wheels for events, it may be worth the slightly reduced weight and generally minisculely higher performance of the lower spoke count wheel.

If you were a heavier rider, I'd say avoid the lower spoke count wheel, but you'll have no problems regardless, assuming the wheels are in good shape when you get them.

A 160 pound rider will have no issues with pretty much any quality wheel set on the market now, but if your primary use is as a training wheel set, get the 24 spoke count set.

It hurts nothing, and may affect the time between maintenance cycles slightly.

If you will use the wheels for events, it may be worth the slightly reduced weight and generally minisculely higher performance of the lower spoke count wheel.

If you were a heavier rider, I'd say avoid the lower spoke count wheel, but you'll have no problems regardless, assuming the wheels are in good shape when you get them.