Photoshop's camera raw is the exact same thing at Lightroom so the noise reduction is the same. Photoshop has noise reduction in the filter(?) drop down menu which I have never used but camera raws noise reduction is awesome.
So basically Lightroom can't have a better noise reduction since photoshop has the same.
You are probably right but I can get better results from lightroom, so imho, either through ease of use or because lightroom has something photoshop doesn't I think lightrooms noise reduction is better
Completely not true. They are the exact same program. Exact same noise reduction-unless you haven't updated your version of adobe camera raw.
Not wishing to start a side-argument here, but the above statement is slightly inaccurate and shows some misunderstanding.
They are not the same program, although I understand they are based on the same raw processing engine.
Whilst this may seem pedantic, it is potentially an important distinction. Essentially an 'engine' is just a piece of code which is designed to provide a series of services to anything that has the access to use it. Although 'engine' is a relatively new term, it just describes something programmers have been doing since the coding stoneage. Typically each service or function within an engine will require one or more inputs which will be processed by the engine to produce one or more outputs. The quality of the output will always depend upon the quality of the inputs. This means that the results from any engine will almost always be dependant on the calling code - in this case lightroom or ACR - and if there is any difference between the inputs they provide for any given circumstance, the results will likely be different. A silly example would be if one of them had a bug which altered one of the input values: in that case the output would be different even though the same engine is being used to process it.
I have no knowledge of the Adobe code and I suspect that they do in fact both provide exactly the same inputs to the engine if the same options are selected in either of the apps. My point is that none of us actually knows for sure (unless we have access to the actual release code) and also to challenge the assumption that two programs that utilise the same engine will always perform in exactly the same way.
Its also relevant to acknowledge that the engine is hidden from the end user by the user interface (lightroom v ACR) and therefore it is likely that an individual may find one UI easier to work with and therefore may find that they get better results from one rather than the other, which was a possibility suggested in jaomul's post.
Anyway, back on-topic, my suggestion for the OP would be to get both lightroom and Photoshop if possible. They work very well together.