I am not professing you should add a few lbs to the front of your bike just to smooth out the ride. But what you need to know is the axle-crown measurement of your current rigid fork.
However, it may be simpler for you to just contact Merida and find out the frame geometry specs for the Crossway Trekking and the Crossway Urban.
Merida touts the Crossway Trekking as “A perfect blend of comfort, enjoyment and all-round functionality, suitable for fitness training, commuting and leisurely rides through forests and on trails.”
Not to discount the NORBA references but I can’t recall the phrase, “leisurely rides through forests and on trails” in any of their race documentation.
I’m betting both frames are the same.
John