The 1400 rail is not ideal with the 75 due to the bigger base. It works fine for smaller cuts, but you need the 1900 to crosscut sheets. I bought the 75 as my first Festool and have used it for most cutting. I recently acquired the TSC55 and really enjoy not bring tethered. So handy for quick cuts. It is lighter than the 75 and honestly it seems to me that it has more power than the corded 55. I cut 8/4 and it does not bog down like the 55 seems to do. You would need more batteries if wot king all day and of course the dust bag has to be emptied regularly, which can be a pain.
That said, I think the 75 is a great saw and probably the most versatile due to power and depth of cut. The 55 accomplishes most tasks, is lighter and the cordless version gives you added flexibility.
That said, I think the 75 is a great saw and probably the most versatile due to power and depth of cut. The 55 accomplishes most tasks, is lighter and the cordless version gives you added flexibility.