R studio server vs R server and Small computer to run R

I am looking for a small computer low power that I make available on the web that will run R studio server or R server
1) can anyone recommend a computer?
2) can anyone let me know the advantages and disadvantages of R studio server and R server?
Thank you
John

John David Sorkin M.D., Ph.D.
Professor of Medicine
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)

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