I would like you to correct this to more natural English please.
- - - - -
I recommend you a burger named CHICKEN TARTAR of MacDonald's when you are traveling in Japan.

CHICKEN TARTAR is one of the original burgers of Japanese MacDonald's, and it is available for a limited period only from February 2018.

To be honest, I think most of the burgers of MacDonald's are not so tasty for me but only CHICKEN TARTAR and CHICKEN TATSUTA are delicious.

These are made with juicy deep-fried chicken, cabbage and higher quality bun than the other burger's.

CHICKEN TARTAR is added tartar source in CHICKEN TATSUTA. However, these are the same price for 380 yen including 8% tax. I can't understand why the same price though.

CHICKEN TATSUTA is also delicious but I prefer CHICKEN TARTAR because the tartar sauce makes it filling. Does this sound natural?

When you travel to Japan, I recommend you try the Chicken Tartar burger at McDonald's. It is one of the original, limited-time burgers offered in the Japanese market beginning in February 2018.

Honestly, I feel that most burgers from McDonald's do not taste good. I find these two burgers to be delicious though. They're made with juicy, deep-fried chicken, cabbage and a higher quality bun in comparison to their other burgers.

I do not understand how the pricing is the same when the Chicken Tartar is essentially the Chicken Tatsuta with added sauce. They are both available for 380yen including 8% tax.

The Chicken Tatsuta is delicious but I prefer the Chicken Tartar because sauce makes it more satisfying.
======
A few things to note:
-if the price you pay is 380 yen, there is no need to mention that it includes an 8% tax; if the price is 380 yen + 8% tax (additional) then it is okay to mention the tax rate
-in the second paragraph, I do not mention the burger names because it is implied that I am speaking about the ones I mentioned in the first paragraph
-the last sentence I changed "filling" to "satisfying" because I did not understand the message you were trying to convey; it is unlikely that adding a sauce will make a food more "filling" as that is typically used when you talk about quantity of food