Ohmygodkwhilbornisstalkingme! Hehasjoinedathreadafterididthereforebeingclearevidenceheisstalkingme!
Right, paranoid hat off.
Both sentences say the same thing. It seems obvious the second sentence is an opinion.
The second sentence is more a statement of obligation/duty and does not necessarily imply opinion.
The first is explicitly an opinion.
Compare the following to illustrate what I mean:
"Car drivers in the UK should wear seatbelts."
"I think car drivers in the UK should wear seatbelts."
The first, in this context, is a statement of obligation due to the law, and the second more clearly an opinion.
There can be some overlap in meaning, sure, and as you say, the statement of obligation could be strengthened through using "must".
But I think it is too specific to say that the two sentences say the same thing.
I'd agree that the two
could mean the same thing, but don't necessarily have to. As with many aspects of meaning within the english language, It depends upon context.
Cluttering a sentence can make it beautiful though,
I'd argue that if words add to the meaning or help paint a picture then they should not be considered "clutter".
Clutter would be words that can be removed without diminishing the effect of the sentence in any meaningful way.
So in your example I would not consider the additional descriptive words as clutter, as they add value.