No Tailed Beasts has gathered Natural Energy to replenish their own reserves. The remerging all Tailed Beasts change the nature of their chakra. They also are not pure chakra, they can eat, produce bodily liquids, have bones, etc. Banbutsu Sōzō gave them physical bodies through imagination (Yin Chakra), and breathed life into them (Yang Chakra). The only time they revert to pure chakra is when they are being sealed or are unsealed for the first few seconds.
The Ten Tails has shown its own unique abilities, sharing only the Tailed Beast Ball and Shockwave with the rest of the Bijuu. It cannot sense negative emotion like Kurama, produce ink like Gyuki, form wings like Chomei, make corrosive alkali like Saiken, use Boil Release like Kokuo, Lava Release like Son, fireballs like Matatabi, or Magnet Release like Shukaku.
In return, the Tailed Beasts do not share the special connection to Natural Energy like the Ten Tails, cannot use Wood Release, Rinne Sharingan, Truth Seeking Balls, etc.