I'm adult beginner and 'm studying on an old Roland E66.
Because I hope to continue the study I need a good 88 keys DP with digital features also(love both classical music and rock)
I think interesting Yamaha DGX630 and Casio PX330 but someone (very few) reported Casio mechanical keys problems.
Any advice will be appreciated. Thanks

I had a Roland E series too.

Lok at the P85 in place of the DGX630. It has the same keys mechanium (GHS) slightly better piano sound and costs less

But check out the key feel on other DPs from Roland and al the others. Don't look at the prices. At this point the goal s to learn the differences

My guess is it you came up with the DGX630 and PX330 you are shopping based in price and features. Don't. The key action is what matters. The DGX630 and PX330 have diferent enough key actions that I can't see how you would like them both.

ChrisA You're right. I'm choosing with eyes on budget.
I have been at shop but it has been terrible.
I do not feel difference between pianos beneath my fingers, I cannot understand which one would be better for me and why.
I need different views.
ChrisA, what about Kawai ES6 or Roland FP4-FP7 ?

The Yamaha DGX-630 and the Casio PX-330 are similar pianos. If you were planning to do gigs, the Casio would have an advantage in being portable and lightweight. Overall, the Casio is more versatil because of the connectivity options it offers and it has more registration memory than the DGX-630. You can also edit some of the sounds and make your own rhythms from the built in drum loops. Casio also put in a 16 channel mixer to record. However, as Chris A notes, the touch of both pianos is very different as is the sound of the piano patches. As far as sampling other pianos out of your price range, that is helpful for the sake of comparing and seeing what each offers. You might end up buying something more expensive or staying where you are at. Touch and sound are the two most important things. Ultimately the choice comes down to those two and of course the price. Be sure and bring a good pair of headphones to compare and take your time. You should be able to tell what you like and why.

Many thanks for comments.
I sometime mixed up reading topics and topics make me sometime smile.
I agree sounds are opinions while I was expecting uniform mechanical point of view. On the contrary the same DP might have both positive and negative review.
This moment I understood that a fairly good piano cannot coexist with a digital keyboard and because I'm learning piano I must choose a DP more expensive
I'm on starting line again.

I'm also an adult learner and I started with the DGX620 which is identical to the DGX630. I'd considered a Casio and a Kawai DP of similar price range and had decided on the Yamaha because of its weighted key action and learning features. I find the key action on Casio DPs too much like electronic keyboards and that Kawai DPs are short on other useful features.
After progressing to about Grade 4 level, I find virtually all the DPs on the market less than satisfactory. It is near impossible to try to produce the nuances and dynamics required at intermediate to advanced levels on the simulated weighted key action and sustain pedal on the DPs. Hence, I have since graduated to an acoustic upright and have never looked back. But still, my DGX620 has served me well in the last 3 years or so. I now use it for playing pieces with dual/split voice.

Good point Late-Starter. All DP's are an imitation of an acoustic. There's just no substitute for the real thing especially if you are a purist. On the other hand, DP's give you things you don't get on an acoustic like more voices, recording, and connectivity options. A DP never goes out of tune either. Personally I like the options of the other voices and the ability to use it on a computer if one chooses, but the point here is that a DP in a simulation of a real piano.