One is designed to let you Synchro Summon while you Synchro Summon, while the other is stall incarnate.

17PR-JP009 武力［ブリキ］の軍奏 Buriki no Gunsou (Tin Musical Battlemech)

Level 3 WIND Machine Synchro Tuner Effect Monster

ATK 500

DEF 2200

1 Tuner + 1+ non-Tuner Monsters

You can only use this card’s name’s 1st effect once per turn.

(1) If this card is Synchro Summoned: You can target 1 Tuner monster in your GY; Special Summon that monster in Defense Position, but its effects are negated.

(2) A Synchro Monster that used this card as Synchro Material is treated as a Tuner while it remains face-up on the field.

Note: it’s name might also work as Brass Sergeant? It’s really ‘punny’.

17PR-JP010 キキナガシ風鳥［フウチョウ］ Kikinagashi Fuuchou (Disdainful Bird of Paradise)

Rank 1 WIND Winged Beast Xyz Effect Monster

ATK 0

DEF 0

2 Level 1 monsters

(1) This card is unaffected by other card’s effects.

(2) Once per turn (Quick Effect): You can detach 2 Xyz Materials from this card; For the rest of this turn, this card cannot be destroyed by battle, also you take no battle damage from attacks involving this card

17PR is the set ID for the cards in the promotional pack that will be handed out starting at the Duelist Festival.

Source