1. Titration experiment
2. Galvanic cell experiment
could you also provide a list of the pros and cons of these experiments?

The devil is in the details - what kind of support, hardware, glassware and reagents is available.

Titration is easy as long as you have patience and a working burette. I'd go for that.

On the other hand, I think you will find the electrochemistry experiment far more interesting. (I am old now, so forgive me if I do not understand. I figure you are under 20.) Is it really important whether you get a 20/20 rather than say a 19/20 or 18/20. Maybe you can impress the chemistry teacher and get a really good letter of recommendation if you go far the harder experiment. Maybe your instructor will be more impressed and more easily grade the harder experiment. Of course, I cannot even be sure the gavanic cell is the harder experiment. The question really should be in which experiment will you learn more from.

PS, I found titration (in eleventh grade) as stock and trade for a practicing chemist, but I will never forget the excitement I got from electroplating a nail, (in fifth grade), although clearly, your chemistry class will be more advanced than that fifth grade experiment, which did not even require a write-up.