If you buy EQ7, look at the price on quiltinaday. You have to the item in your shopping basket to see the reduced price.
The mini version of EQ does not appear to have the capability to design your own blocks. I don't think it's worth buying without that feature. I don't know how it compares to Design Wizard, which I do have (in addition to EQ7). I bought both at the same time because Design Wizard was so cheap - but I only use EQ.