Higuain netted a hat-trick in Napoli's 4-0 win over Frosinone at the weekend to take his tally to 36 goals in Serie A this season, eclipsing Gunnar Nordahl's record of 35 set back in 1950.
The 28-year-old finished four goals behind Suarez in the race for the European Golden Shoe, but Toni nevertheless prefers the Napoli man over the Uruguay international.
"I think Higuain has done a fantastic job," Toni told Tiki Taka.
"He has done something exceptional, also because he has not even played all games.
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"Gonzalo is from another planet. For me, he is even stronger than Suarez."
Despite Higuain's magnificent efforts, Napoli have been linked with a shock transfer for Zlatan Ibrahimovic, who is due to leave Paris Saint-Germain on a free transfer.
However Toni believes a move for the Sweden international would only work if Napoli were to switch to a formation with two strikers.
"Ibrahimovic to Napoli would be difficult," he added. "Higuain has been doing really well already.
"Unless they would be playing up front together."