Topres are very refined rubber domes. Smoother, and lighter. Very nice, but not tactile unless you bottom out.
I would classify the Topre as tactile. The 30g keys are not very tactile, but there is a bump there, which is more pronounced in heavier keys. They don't feel like linear mechanical switches at all.
Topre Realforce are high quality rubber dome keyboards throughout. You could say that they are the First Class of rubber dome keyboards.
Alps came in many varieties and revisions made by different companies. The original manufactured by Alps is called "complicated" because of the design of its innards. Some clones also have the Alps logo, so all are not that easy to identify. There are several types of linear, clicky and tactile.
Some do feel a bit like some rubber dome keyboards, because the tactile point is pretty high up.That is especially true of the "Cream" Alps, which is dampened. Alps are also a bit sensitive to dust, so used Alps boards can feel either great or awful depending on their history.