I just use an electric impact and never have a problem getting my blades off. I don't even have to block them to keep them from turning. They impact is so fast it breaks them loose before they turn.
I'm new to the forum and I did search several times to try to find a comparison. I'm not interested in any other brands because there are no other dealers close. I mow about 3 acres regularly and will mow about 3 more occasionally. I don't want to go any bigger or more expensive than these two...