"Rayini Matram Kante Devudu Kanaradu.." is the most popular song from Dasavataram in which Kamal Hasan sings it while getting tortured by the King. The demand of the king was to make Kamal Hasan say 'Om Namassivaya', but he disobeys. This is the song with the lyrics connoting devotional and spiritual depth.
Similarly NTR in 'RRR' sings 'Komarum Bheemudo..' while getting tortured by the British ruler. The demand of the British ruler is to make NTR kneel down, but he resists. The song is about the sacrifice of a martyr who keeps up the pride of his motherland with his own blood.
Of course, the song 'Ikshvaku Kula Tilaka..' from Sri Ramadasu was also shot in similar style.
There are many inspirations from several films in RRR.
Ram Charan kept in solitary confinement by the British resembles some scenes from Chiranjeevi's 'Veta' from 1980s.
NTR and Olivia Morris' track is a direct inspiration from Aamir Khan's Lagaan.
The wife of British ruler giving orders to punish NTR resembles the scene of Eddie Murphy and Iman Abdulmajid from Michael Jackson's music video 'Remember The Time'.
Whatever be the inspiration, Rajamouli can be compared only to Rajamouli. None can come close to him and he is the master craftsman in making high budget films. As per many audience, if Rajamouli gets inspired from something, then it is only to re-create it perfectly erasing the flaws in the original.