Every Instrument Dealer has his or her strong points.
Our Sitar 4 is built on the same platform as Sitar 3. Both sitars are of a well seasoned Tun wood. Both sitars are very well made, one is made with a 'Full Gulab Patti' design the second is 'Phoolon Ki Har'. The maker showed me the designs, and we decided to add them in our collection.
The manufacturer of these products, as it is very clear in the workmanship, is Calcutta based. Personally, I can not make that assessment with Mr. Jacobsen's products, as I have not played his sitar(s).
I guess the best way for you to determine the sound of the instruments is, as said by many members in this forum, visit the dealer.