Google translates your post as:
Good day. Which counter is better. What do you recommend. Of the two that you recommend. greetings.
These two SWR/power meters appear to be very similar. I'm not familiar with the Maas brand and I've never seen it for sale in the U.S.
I will assume that the Maas meter is a copy of the Diamond meter, but I have no basis for that opinion other than appearance.