Ectomorph, mesomoprh, ecto-meso doesn't have any significant impact on how you should be dieting.

Sure, you are skinny previously and obviously you are happy that you've gained 9kg but how much from that 9 kg is fat and how much is muscle?

I have a cousin who aimed for 80kg bodyweight since he is skinny. Yes, he does managed to get to that weight but all of them are fat. That is not a good body to have.

Right now the only question that you need to ask is that, do you have enough muscle? Does all that 9 kg is all fat? Because if it is all fat, then if you enter the cutting phase, you'll lose all that 9 kg.

That depends on you. One way is not better than the other if planned and executed properly.

People opt for lean bulk if they do not want to deal with cutting later which generally involves a period of time where they have to dedicate many hours of cardio and strict calorie deficits. Also, if they dislike the physical look of added body fat they are probably better off lean bulking as the mental strength and discipline to continue despite not being 'ripped' can be too hard for some people.

However, gains are slower and alot of patience is needed to lean bulk.

With plain traditional bulking, gains are quicker and strength gains can be significant in comparison. Thats generally the appeal. Not to mention, many enjoy the added calorie surplus you eat at when bulking (Doublecheese burger with extra cheese and fries on the side? Yes please!!).

However, like I said earlier, you have to cut later which can be alot of work depending on how quickly you want to get ripped. And a cut diet has to be on point to minimise muscle loss.

You have to decide for yourself which is better because your the one who has to put in the time work and effort.

there is actually a simple formula for idea weight:

height in cm - 100 = idea weight (with bf% < 10%, for male)

which means that u can actually bulk to >85kg, before cutting back, since u are quite tall.

good luck.

Have you measure your body fat percentage?

I would continue bulk slowly as Dan suggested..keep an eye on the scale..measure the body fat percentage. There are many online..

You want to be choose a range you are comfortable with...usually 10-18% bodyfat.. consume a surplus until you hit 18% or higher. Once you hit 19% you know its time to slow down on the bulk...eat cleaner and maintain the calories until you lower bodyfat go back to 15% or lower..

but if you are real ectomorph..cutting shouldnt be a problem to u. you already know what to do for cutting without even thinking about it. eating should be the main concern..